He had a vague impression of rain pounding on the packed earth.他隐约记得雨点打在坚实地面上的情景。Their name comes from South Africa's Afrikaans language and means " earth pig. "他们的名字源于南非的荷兰语意思是 “ 泥猪 ”.The earth should be elliptical...
总计109个病人做了体格检查, 心电图,超生心动图.A total of 109 patients underwent physical examination, electrocardiogram and echo cardiography.超声波心动图通常是最为有用的MVP诊断性检查.An echocardiogram is the most useful test for diagnosing MVP.超声心动图检查肺动脉瓣功能良...
Automatic Gain Control ( AGC ) is widely used in communication. radar & amp ; instrumentation systems.自动增益控制 ( AGC ) 环路广泛地应用于通信、雷达 、 仪器系统.There is a radar net in our area.在我们那个地区有一个雷达网。The application of wide - band digi...